Multicolor attachment for flat-bed web-printing presses



Dec. 23, 1930. P. F. cox 1,786536 MULTICOLOR ATTACHMENT FOR FLAT BED WEB PRINTING PRESSBS Filed July 1a. 1929 2 Sheets-Shoot 1 ATTORNEY .7 ,d

Dec. 23, 1930. P. F. cox ,33

MULTICOLOR ATTACHMENT FOR FL AT BED WEB PRINTING PRBSSES Filed July 13. 1929 2 Sheets-Sheet 2 gwmmk.

r Patented Dec. 23, 1930 rant r. cox, or CHICAGO, ILLINOIS,,AISSIGITTC1RLVVTO THE eossrRI'NrING-rREssoo PANY, OF CHICAGO; ILLINOIS,

a. QQRPOBA'IION or ILLINOIS 'MULTIcoLoR ATTACHMENT roaster-imp WEB-PRINTING PBESSES Application filed July 13,

Thisinvention relates to web printing presses of that typein which the web is printed by means of'upper and lower cylinders respectively cooperating with upper and .5 lower type beds; the web being usually led first between the lower bed and cylinder and then between the upper bed and cylinder to be perfected thereby.

In s inc of these presses thetweb is printed only on one stroke of the cylinders while in others the web is printed onboth strokes of the cylinders, both well-known. a l The object ofthe present invention is to provide a simpleattachment for such presses whereby, i fin'desired, anarrow web may be printed'on one side by one bed and cylinder and then turned ,intermediatethe beds so that th' esame sideiofith e web can be thereafter printed in color by the other" bed and cylinden". w r

Theinvention includes an attachmenthav- 'ing; angle bars and deflecting rollers where-V bya narrow web after beingprinted on one 5 bed on one Side islateraHy diverted so that the same side of the webis again printed on the other bed in another color. 1 For example a half width web is led from the lower impression cylinder up over angle bars and rollers. and passed to the upper bed at the opposite side of the press. This permits printing both in black and in one color. on the same side ofthe web. Aha'lf width web or a quarter width web can be run with this arrangement. l

flThe invention also includes meanswhere- 'by the rollersflcan be driven by a small auxil .fiQ the nov l featuresot c nstru tio and n vel types of presses being 1929. Serial No. 378,166;

combinations of is desired.

.' Inthe drawings V Figure 1 IlSfiJ top-plan view ofpart of a flat-bed web printing press of thetype mentioned,.,with my noveL attachment" applied tlieretoto enable a narrow web to be printed in multi-color.

parts, for which protection Figure 2is an end elevation of Figure l. l

Figure 3 is a side, elevation of Figure 1.

Figures is a detail. I J a y F ig.- 5 -isaperspective view. showing the path ofthe web through the deflecting devices. V r 1 In the drawings 1 and la designate type beds and 2 and 2a impression cylinders cooperating with said beds. -The web W is ordinarily. led first between the lower bed and cylinder to be printed onione side and then led up over guides 3 and 3a to andbetween the upper bed and cylinder to be perfected thereby. These parts and their operation being well known, no further description or-detailed illustration thereof isnecessary. i In such presses, as ordinarily constructed, the webs can be perfected in one color, but cannot be printed in -1nulti-color. To enable such a press to print a narrow web in multicolor, for instance in black and one other color, I provide at the end of the press adjacent to guides 3, 3a an attachment, comprising a suitable framing, preferably detachably attached to the end of the press frame, and in said framing are mounted an angle bar 4; adjacent the end of the lower bed; an oppositely inclined angle bar 7 adj acent the end of the upper bed {also a guide roller 5 adjacent the outer endofthe angle bar 4, and a guide roller 6 adjacent the outer end of angle bar 7. The rollers Sand 6 are arrangedparallel with each other and with the longitudinal axis of the press.

I As shown' the'outer' ends of angle bars 4 and' 7' and rollers 5 and 6 are supported in post or standard 8i The rear or inner end of angle bar l is connected to a standard 9,

, and the inner end of angle bar 7 is connected to a standard 9a. The inner end of the roller 6 is supported, 011 a transverse m i er 10 connecting standards 9, 9a and the inner end of roller 5 is supported on a transverse member a connecting the standards 9, 9a. These members properly space the standards apart the width of the press frame. The standard 8 may be connected to the standards 9, 9a respectively by braces 11 and 11a as shown in the drawing.

The specific construction of the framing in which the angle bars a and 7 and rollers 5 and 6 are mounted is not an essential feature of the invention. The standards 9 and 9a may be provided with arms 9?), 90, which can be bolted directly to the adjacent ends of the main side frame F of the press, as indicated in the drawings at 96 to hold the attachment securely to the press and space it the proper distance from the press so that there will be an even number of sheet lengths between the upper and lower beds to insure proper register of successive imprints.

The usual adjustable guide roller 26 adjacent cylinder Qa can be used to compensate for any small variation in the sheet lengths and insure register of successive impressions on the web. The braces and bars connecting the standards make the framing rigid, and the whole attachment can be detachably attached to the press by bolts 90 as indicated in the drawings.

The angle bars and rollers of the attachment are so disposed that a narrow Web TV after being printed on lower bed 1, may be led past the lower guide roller 3 to and over the angle bar 4 by which it is turned at right angles and directed to the roller 5; from roller 5 the web is led to and over roller 6, and thence to and over angle bar 7, by which it is turned at right angles and directed to guide 3a, and thence to and between the upper bed and cylinder to be printed the second time on the same side. The length of the web overlying the upper bed is parallel with the length of web overlying the lower bed but such lengths are at opposite sides of the press.

The drag or friction of the web on the angle bars i and 7 and rollers 5 and 6 would create so much resistance to movement of the web that the usual web delivery devices would not be able to properly shift the web forward over the beds in the intervals be tween impressions (as is required in the oper' ation of such presses) therefore I provide means for driving the rollers 5 and 6 so as to help feed the web and compensate for the additional friction placed thereon in passing over the angle bars 4 and 7 For this purpose a small electric motor M is placed on a shelf 8a supported by standard 8; motor M is belted by belt to a pulley 5a on roller 5 and turns it in the direction indicated by the arrows in Figure 2. Cross belt drives a pulley 6a on roller 6 from a pulley 505 on roller 5. These two rollers 5 and 6 are driven by the motor in the direction of travel of the web at a speed somewhat over the desired web speed. The motor M can be attached to any ordinary lamp socket or source of electricity as indicated in the drawing.

These independently driven rollers 5 and 6 keep the slack out of the loops and turns of the web in the attachment and between the beds 1 and la, and assist the usual press web delivery devices in drawing the web through such loops and turns. Vithout these driven rollers the slack necessary to maintain in the loops would permit the paper to slip on the angle bars a and 7 and it would not be possible to properly control it. The independently driven rollers overcome these difiiculties and permit the successful turning of the web intermediate the beds.

The whole arrangement or attachment can be placed at the outer end of the press and fixedly or detachably secured to the press frame; and in the latter case the whole attachment can be removed when it is not desired to use same.

I claim:

1. In combination with a flat bed travelling cylinder web printing press having guides for directing a web successively between the cylinders and beds; web defiectlng devices at the end of the press adjacent the beds, said devices including upper and lower angle bars and intermediate guide rollers whereby a narrow web after being printed on one bed can be deflected to one side before it reaches the second bed in such manner that the lengths of web over the beds will be parallel but at opposite sides of the press and the same side of the web will be presented to both beds.

2. In mechanism as set forth in claim 1, said web deflecting devices including means whereby the web will be forwarded.

3. In mechanism as set forth in claim 1 said deflecting means including a small electric motor whereby the said intermediate guide rollers may be positively rotated in a direction to forward the web passing thereover.

4. In combination with a flat bed web printing press having upper and lower beds, cylinders cooperating therewith, and means for directing a web successively between the beds and cylinders; inclined angle bars adjacent the outer ends of the beds, and auxiliary guide rollers parallel with the longitudinal axis of the press and arranged intermediate the angle bars whereby a narrow Web after be ing printed on one bed can be deflected to one side before it reaches the second bed in such a manner that the lengths of web over the beds will be parallel but on opposite sides of the press and the same side of the Web will be presented to both beds.

5. In mechanism as set'forth in claim 4 means whereby the said intermediate guide rollers are rotated in a direction to forward the web passing thereover. v V 6. In mechanism as set forth in claim 4: said deflecting means including a small electric motor whereby the said intermediate guiderollers may be positively rotated in a direction to forward the web passing there- Over.

7. An attachment for flat bed Web printing presses having upper and lower beds, cylinders cooperating therewith and means for directing the web successively between the beds and cylinders; said attachment comprising a frame attachable to the end of the press, oppositely inclined angle bars mounted in said frame respectively adjacent the ends of the beds; and guide rollers mounted in said frame parallel with thelongitudinal axis of the press and intermediate said angle bars; whereby a narrow webafter being printed on one bed can be deflected to one side before it reaches the second bed in such a manner that the lengths of web over the beds will be parallel but at opposite sides of the press, and the same side of the web be presented to both beds. f

8. In 'mechanism as set forth in claim 7 means whereby the said intermediate guide rollers are rotated in a direction to forward the web passing thereover. I

9. In mechanism as set forth in claim 7 i said deflecting means including a small electrio motor whereby the said intermediate guide rollers may be positively rotated in a direction to forward the web passing thereover.

10. In a flat bed travelling cylinder web printing press having superposed beds, cylinders coacting with such beds, and guides for directing a web successively between the cylinders and beds, web deflecting devices-at the end of the press adjacent the outer ends of the beds, whereby a narrow web after being printed on one bed by one cylinder can be deflected to one side. before it reachesthe other bed in such manner that the'same side of the web will be printed by the other bed and cylinder, and the lengths of web on the beds will be parallel but at opposite sides of the press.

11. In mechanism as set forth in claim 10, said web deflecting devices including means whereby the Web will be forwarded.

7 PAUL F. COX. 

